Qualitas Corpus

The Qualitas Corpus is a curated collection of software systems
intended to be used for empirical studies of code artefacts. The primary
goal is to provide a resource that supports reproducible studies of
software. The current release of the Corpus contains open-source Java
software systems, often multiple versions.

The current release is version
20130901. It has 112 systems, 15 systems with 10 or more versions, and
754 versions total. There are two main distributions: the "r" (recent)
release, containing the most recent versions we have of every system (112
systems) and the "e" (evolution) release, containing all versions of the 15
systems with 10 or more versions, a total of 579 versions. There
are other distributions
available.

In publications that use the corpus,
please cite the APSEC paper
and always identify the release used.